Vehicle Light Cradle Tab Mechanism for Brittle Lens Positioning
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Solution Overview
Problem
Aggressive or sporty lens designs for automotive wraparound lights are difficult to secure properly due to the brittleness of the lens material, leading to potential bending and inaccurate positioning, which degrades the vehicle's appearance and has led designers to avoid such shapes.
Innovation Solution
A light assembly that includes a cradle with a slot defined by two spaced apart surfaces and a tab projecting from the body panel's outthrust, allowing for slidable engagement to secure the outthrust relative to the light unit, preventing movement and ensuring a flush fit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If aggressive or sporty lens designs are used, then aesthetic appearance is improved, but securing reliability deteriorates due to lens brittleness
Solution Approach 1:
The patent introduces a cradle as an intermediary component between the lens assembly and the body panel. The cradle includes a locating cradle portion that engages with a tab on the body panel through slidable engagement, providing a secure mounting structure that protects the brittle lens while enabling aggressive designs. This mediator transfers and distributes mounting forces away from the lens itself.
2Ease of manufacture
If lens material is made brittle for design purposes, then manufacturing ease is improved, but positioning accuracy deteriorates due to potential bending
Solution Approach 1:
The patent implements preliminary positioning through the locating cradle portion that engages with the tab before final assembly. The slidable engagement mechanism pre-locates the lens assembly in the correct position, preventing subsequent bending or misalignment. This preliminary action ensures positioning accuracy is established during assembly rather than requiring post-assembly adjustment.
3Device complexity
If simple mounting structures are used, then device complexity is reduced, but fit accuracy deteriorates leading to degraded appearance
Solution Approach 1:
The patent segments the mounting structure into distinct functional portions: a mounting portion for attaching to the housing, a locating cradle portion for engaging the tab, and support surfaces for positioning. This segmentation allows each portion to be optimized for its specific function while maintaining overall simplicity. The modular cradle design achieves precise fit without requiring complex integrated structures.
Data Source
AI summary
A light assembly for a vehicle includes a light unit having a housing and a lens attached to the housing. A cradle is disposed on the housing, and the cradle includes a first guide surface. A body panel includes a cantilevered portion, and the cantilevered portion includes a tab projecting from an interior side of the cantilevered portion. The tab is configured to be slidably disposed adjacent the first guide surface to locate the cantilevered portion relative to the light unit.